Practice 3-2 Variables and Expressions

Name

Class

Date

Practice 3-2

Write a variable expression for each model. Squares represent ones. Shaded rectangles represent variables.

1.

2.

Variables and Expressions

3.

Evaluate each expression. 4. 56 ? b for b = 7

6. v + 16 for v = 9

5. 3m for m = 9 7. 2t - 8 for t = 21

8. 2(4e) for e = 5

9. 12 - 2g for g = 3

10. 3pq for p = 3 and q = 5

11. 9r + 16 for r = 8

Copy and complete each table.

12. x 2 5 8 11

x + 7 9 12

21

13. x

5x

3

6

9

12

75

14.

x

15

30

45

60

15. A cellular phone company charges a $49.99 monthly fee for 600 free minutes. Each additional minute costs $0.35. This month you used 750 minutes. How much do you owe?

125 - x 50

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